BIO152H5 Chapter 26: Chapter 26 Notes.docx

63 views6 pages
School
Department
Course
Professor

Document Summary

If gene flow ends, allele frequencies in isolated populations are free to diverge - meaning that populations begin to evolve independently of each other. For example, when a new mutation creates an allele that changes the phenotype of individuals in one population, there is no longer any way for that allele to move to the other population. If mutation, selection, and genetic drift cause isolated populations to diverge sufficiently, distinct types, or species, form that is, the process of speciation takes place. Speciation is a splitting event that creates two or more distinct species from a single ancestral group. When speciation compete, a new branch has been added to tree of life. Speciation results from genetic isolation and genetic divergence. Genetic isolation results from lack of gene flow, and divergence occurs between selection, genetic drift, and mutation proceed independently in the isolated populations. Species: an evolutionarily independent population or group of populations.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related textbook solutions

Related Documents

Related Questions